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Security · x402 · early usage

Issue or verify a canonical human mandate checksum and deterministic action constraints…

Issue or verify a canonical human mandate checksum and deterministic action constraints, including signature trust-policy checks.

by api.blockchainmoneymap.com · discovered, not yet claimed by its owner · updated 2026-10-03

30d calls2
30d payers1
MethodPOST
Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Issue or verify a canonical human mandate checksum and deterministic action constraints, including signature trust-policy checks.

Tags: bazaar

Call contract

Method
POST
Input
json
Output
json
Last paid call
2026-10-03
Input example from Bazaar metadata
{
  "intent": {
    "allowedActions": [
      "buy:x402:wallet-snapshot"
    ],
    "allowedCurrencies": [
      "USDC"
    ],
    "allowedNetworks": [
      "base"
    ],
    "allowedResources": [
      "wallet-snapshot"
    ],
    "allowedSellers": [
      "agent-b"
    ],
    "audience": "devagentpal:intent",
    "blockedResources": [],
    "blockedSellers": [],
    "delegation": {
      "allowedDelegateIds": [
        "agent-a"
      ],
      "maxDepth": 1
    },
    "maxSingleSpend": "0.05",
    "maxTotalSpend": "0.10",
    "nonce": "intent-demo-1",
    "objective": "Allow one low-cost wallet snapshot.",
    "principalId": "human-operator-1",
    "privacyRules": {
      "allowCredentialSharing": false,
      "allowPersonalData": false,
      "allowPromptSharing": false,
      "allowResale": false
    },
    "prohibitedActions": [
      "trade",
      "transfer"
    ],
    "validFrom": "2026-07-19T00:00:00.000Z",
    "validUntil": "2026-07-20T00:00:00.000Z",
    "version": "1"
  },
  "mode": "issue"
}
Output example
{
  "example": {
    "checksumValid": true,
    "decision": "allow",
    "evidence": {},
    "generatedAt": "2026-01-01T00:00:00Z",
    "inputFingerprint": "string",
    "intentChecksum": "string",
    "reasons": [
      {}
    ],
    "requestId": "string",
    "riskScore": 0,
    "service": "string",
    "signatureStatus": "string",
    "summary": "string",
    "version": "string",
    "violations": [
      "string"
    ]
  },
  "type": "json"
}

Use with an agent

  1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
  2. Inspect. Fetch /resources/39645.json for the price and payment options.
  3. Pay. Call GET https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
  4. Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price
$0.05 / request
Protocol
x402 v2
Auth
No account or API key. Pay per request.
Networks
Base
Demand
2 calls · 1 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

SchemeNetworkAssetAmountPay toTimeout
exactBase
eip155:8453		USDC$0.050x2211E12e6Bc8Da27B48B9DD66A55f5C3388D713a300s
accepts[] (raw JSON)
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2211E12e6Bc8Da27B48B9DD66A55f5C3388D713a",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "amountUsd": 0.05,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)
{
  "properties": {
    "example": {
      "additionalProperties": true,
      "properties": {
        "checksumValid": {
          "type": "boolean"
        },
        "decision": {
          "enum": [
            "allow",
            "block",
            "review",
            "completed",
            "partial",
            "failed"
          ],
          "type": "string"
        },
        "evidence": {
          "type": "object"
        },
        "generatedAt": {
          "format": "date-time",
          "type": "string"
        },
        "inputFingerprint": {
          "type": "string"
        },
        "intentChecksum": {
          "type": "string"
        },
        "reasons": {
          "items": {
            "type": "object"
          },
          "type": "array"
        },
        "requestId": {
          "type": "string"
        },
        "riskScore": {
          "maximum": 100,
          "minimum": 0,
          "type": "number"
        },
        "service": {
          "type": "string"
        },
        "signatureStatus": {
          "type": "string"
        },
        "summary": {
          "type": "string"
        },
        "version": {
          "type": "string"
        },
        "violations": {
          "items": {
            "type": "string"
          },
          "type": "array"
        }
      },
      "required": [
        "requestId",
        "service",
        "version",
        "decision",
        "riskScore",
        "summary",
        "reasons",
        "evidence",
        "inputFingerprint",
        "generatedAt"
      ],
      "type": "object"
    },
    "type": {
      "enum": [
        "json"
      ],
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}
Example shape — generated from the schema, not a captured live response
{
  "example": {
    "checksumValid": true,
    "decision": "allow",
    "evidence": {},
    "generatedAt": "2026-01-01T00:00:00Z",
    "inputFingerprint": "string",
    "intentChecksum": "string",
    "reasons": [
      {}
    ],
    "requestId": "string",
    "riskScore": 0,
    "service": "string",
    "signatureStatus": "string",
    "summary": "string",
    "version": "string",
    "violations": [
      "string"
    ]
  },
  "type": "json"
}

Examples

curl
curl -X POST 'https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum' -H 'Content-Type: application/json' --data '{"intent":{"allowedActions":["buy:x402:wallet-snapshot"],"allowedCurrencies":["USDC"],"allowedNetworks":["base"],"allowedResources":["wallet-snapshot"],"allowedSellers":["agent-b"],"audience":"devagentpal:intent","blockedResources":[],"blockedSellers":[],"delegation":{"allowedDelegateIds":["agent-a"],"maxDepth":1},"maxSingleSpend":"0.05","maxTotalSpend":"0.10","nonce":"intent-demo-1","objective":"Allow one low-cost wallet snapshot.","principalId":"human-operator-1","privacyRules":{"allowCredentialSharing":false,"allowPersonalData":false,"allowPromptSharing":false,"allowResale":false},"prohibitedActions":["trade","transfer"],"validFrom":"2026-07-19T00:00:00.000Z","validUntil":"2026-07-20T00:00:00.000Z","version":"1"},"mode":"issue"}'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE
JavaScript
const res = await fetch("https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum", {
  "method": "POST",
  "headers": {
    "content-type": "application/json"
  },
  "body": "{\"intent\":{\"allowedActions\":[\"buy:x402:wallet-snapshot\"],\"allowedCurrencies\":[\"USDC\"],\"allowedNetworks\":[\"base\"],\"allowedResources\":[\"wallet-snapshot\"],\"allowedSellers\":[\"agent-b\"],\"audience\":\"devagentpal:intent\",\"blockedResources\":[],\"blockedSellers\":[],\"delegation\":{\"allowedDelegateIds\":[\"agent-a\"],\"maxDepth\":1},\"maxSingleSpend\":\"0.05\",\"maxTotalSpend\":\"0.10\",\"nonce\":\"intent-demo-1\",\"objective\":\"Allow one low-cost wallet snapshot.\",\"principalId\":\"human-operator-1\",\"privacyRules\":{\"allowCredentialSharing\":false,\"allowPersonalData\":false,\"allowPromptSharing\":false,\"allowResale\":false},\"prohibitedActions\":[\"trade\",\"transfer\"],\"validFrom\":\"2026-07-19T00:00:00.000Z\",\"validUntil\":\"2026-07-20T00:00:00.000Z\",\"version\":\"1\"},\"mode\":\"issue\"}"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}
Python
import httpx
import json
res = httpx.request("POST", "https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum", json=json.loads("{\"intent\":{\"allowedActions\":[\"buy:x402:wallet-snapshot\"],\"allowedCurrencies\":[\"USDC\"],\"allowedNetworks\":[\"base\"],\"allowedResources\":[\"wallet-snapshot\"],\"allowedSellers\":[\"agent-b\"],\"audience\":\"devagentpal:intent\",\"blockedResources\":[],\"blockedSellers\":[],\"delegation\":{\"allowedDelegateIds\":[\"agent-a\"],\"maxDepth\":1},\"maxSingleSpend\":\"0.05\",\"maxTotalSpend\":\"0.10\",\"nonce\":\"intent-demo-1\",\"objective\":\"Allow one low-cost wallet snapshot.\",\"principalId\":\"human-operator-1\",\"privacyRules\":{\"allowCredentialSharing\":false,\"allowPersonalData\":false,\"allowPromptSharing\":false,\"allowResale\":false},\"prohibitedActions\":[\"trade\",\"transfer\"],\"validFrom\":\"2026-07-19T00:00:00.000Z\",\"validUntil\":\"2026-07-20T00:00:00.000Z\",\"version\":\"1\"},\"mode\":\"issue\"}"))
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider
api.blockchainmoneymap.com
Endpoint
https://api.blockchainmoneymap.com/api/devagentpal/human-intent-checksum
Machine-readable
/resources/39645.json